<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
    "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
<meta name="generator" content="AsciiDoc 8.6.9" />
<title>diff API</title>
<style type="text/css">
/* Shared CSS for AsciiDoc xhtml11 and html5 backends */

/* Default font. */
body {
  font-family: Georgia,serif;
}

/* Title font. */
h1, h2, h3, h4, h5, h6,
div.title, caption.title,
thead, p.table.header,
#toctitle,
#author, #revnumber, #revdate, #revremark,
#footer {
  font-family: Arial,Helvetica,sans-serif;
}

body {
  margin: 1em 5% 1em 5%;
}

a {
  color: blue;
  text-decoration: underline;
}
a:visited {
  color: fuchsia;
}

em {
  font-style: italic;
  color: navy;
}

strong {
  font-weight: bold;
  color: #083194;
}

h1, h2, h3, h4, h5, h6 {
  color: #527bbd;
  margin-top: 1.2em;
  margin-bottom: 0.5em;
  line-height: 1.3;
}

h1, h2, h3 {
  border-bottom: 2px solid silver;
}
h2 {
  padding-top: 0.5em;
}
h3 {
  float: left;
}
h3 + * {
  clear: left;
}
h5 {
  font-size: 1.0em;
}

div.sectionbody {
  margin-left: 0;
}

hr {
  border: 1px solid silver;
}

p {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

ul, ol, li > p {
  margin-top: 0;
}
ul > li     { color: #aaa; }
ul > li > * { color: black; }

.monospaced, code, pre {
  font-family: "Courier New", Courier, monospace;
  font-size: inherit;
  color: navy;
  padding: 0;
  margin: 0;
}
pre {
  white-space: pre-wrap;
}

#author {
  color: #527bbd;
  font-weight: bold;
  font-size: 1.1em;
}
#email {
}
#revnumber, #revdate, #revremark {
}

#footer {
  font-size: small;
  border-top: 2px solid silver;
  padding-top: 0.5em;
  margin-top: 4.0em;
}
#footer-text {
  float: left;
  padding-bottom: 0.5em;
}
#footer-badges {
  float: right;
  padding-bottom: 0.5em;
}

#preamble {
  margin-top: 1.5em;
  margin-bottom: 1.5em;
}
div.imageblock, div.exampleblock, div.verseblock,
div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
div.admonitionblock {
  margin-top: 1.0em;
  margin-bottom: 1.5em;
}
div.admonitionblock {
  margin-top: 2.0em;
  margin-bottom: 2.0em;
  margin-right: 10%;
  color: #606060;
}

div.content { /* Block element content. */
  padding: 0;
}

/* Block element titles. */
div.title, caption.title {
  color: #527bbd;
  font-weight: bold;
  text-align: left;
  margin-top: 1.0em;
  margin-bottom: 0.5em;
}
div.title + * {
  margin-top: 0;
}

td div.title:first-child {
  margin-top: 0.0em;
}
div.content div.title:first-child {
  margin-top: 0.0em;
}
div.content + div.title {
  margin-top: 0.0em;
}

div.sidebarblock > div.content {
  background: #ffffee;
  border: 1px solid #dddddd;
  border-left: 4px solid #f0f0f0;
  padding: 0.5em;
}

div.listingblock > div.content {
  border: 1px solid #dddddd;
  border-left: 5px solid #f0f0f0;
  background: #f8f8f8;
  padding: 0.5em;
}

div.quoteblock, div.verseblock {
  padding-left: 1.0em;
  margin-left: 1.0em;
  margin-right: 10%;
  border-left: 5px solid #f0f0f0;
  color: #888;
}

div.quoteblock > div.attribution {
  padding-top: 0.5em;
  text-align: right;
}

div.verseblock > pre.content {
  font-family: inherit;
  font-size: inherit;
}
div.verseblock > div.attribution {
  padding-top: 0.75em;
  text-align: left;
}
/* DEPRECATED: Pre version 8.2.7 verse style literal block. */
div.verseblock + div.attribution {
  text-align: left;
}

div.admonitionblock .icon {
  vertical-align: top;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: underline;
  color: #527bbd;
  padding-right: 0.5em;
}
div.admonitionblock td.content {
  padding-left: 0.5em;
  border-left: 3px solid #dddddd;
}

div.exampleblock > div.content {
  border-left: 3px solid #dddddd;
  padding-left: 0.5em;
}

div.imageblock div.content { padding-left: 0; }
span.image img { border-style: none; vertical-align: text-bottom; }
a.image:visited { color: white; }

dl {
  margin-top: 0.8em;
  margin-bottom: 0.8em;
}
dt {
  margin-top: 0.5em;
  margin-bottom: 0;
  font-style: normal;
  color: navy;
}
dd > *:first-child {
  margin-top: 0.1em;
}

ul, ol {
    list-style-position: outside;
}
ol.arabic {
  list-style-type: decimal;
}
ol.loweralpha {
  list-style-type: lower-alpha;
}
ol.upperalpha {
  list-style-type: upper-alpha;
}
ol.lowerroman {
  list-style-type: lower-roman;
}
ol.upperroman {
  list-style-type: upper-roman;
}

div.compact ul, div.compact ol,
div.compact p, div.compact p,
div.compact div, div.compact div {
  margin-top: 0.1em;
  margin-bottom: 0.1em;
}

tfoot {
  font-weight: bold;
}
td > div.verse {
  white-space: pre;
}

div.hdlist {
  margin-top: 0.8em;
  margin-bottom: 0.8em;
}
div.hdlist tr {
  padding-bottom: 15px;
}
dt.hdlist1.strong, td.hdlist1.strong {
  font-weight: bold;
}
td.hdlist1 {
  vertical-align: top;
  font-style: normal;
  padding-right: 0.8em;
  color: navy;
}
td.hdlist2 {
  vertical-align: top;
}
div.hdlist.compact tr {
  margin: 0;
  padding-bottom: 0;
}

.comment {
  background: yellow;
}

.footnote, .footnoteref {
  font-size: 0.8em;
}

span.footnote, span.footnoteref {
  vertical-align: super;
}

#footnotes {
  margin: 20px 0 20px 0;
  padding: 7px 0 0 0;
}

#footnotes div.footnote {
  margin: 0 0 5px 0;
}

#footnotes hr {
  border: none;
  border-top: 1px solid silver;
  height: 1px;
  text-align: left;
  margin-left: 0;
  width: 20%;
  min-width: 100px;
}

div.colist td {
  padding-right: 0.5em;
  padding-bottom: 0.3em;
  vertical-align: top;
}
div.colist td img {
  margin-top: 0.3em;
}

@media print {
  #footer-badges { display: none; }
}

#toc {
  margin-bottom: 2.5em;
}

#toctitle {
  color: #527bbd;
  font-size: 1.1em;
  font-weight: bold;
  margin-top: 1.0em;
  margin-bottom: 0.1em;
}

div.toclevel0, div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 {
  margin-top: 0;
  margin-bottom: 0;
}
div.toclevel2 {
  margin-left: 2em;
  font-size: 0.9em;
}
div.toclevel3 {
  margin-left: 4em;
  font-size: 0.9em;
}
div.toclevel4 {
  margin-left: 6em;
  font-size: 0.9em;
}

span.aqua { color: aqua; }
span.black { color: black; }
span.blue { color: blue; }
span.fuchsia { color: fuchsia; }
span.gray { color: gray; }
span.green { color: green; }
span.lime { color: lime; }
span.maroon { color: maroon; }
span.navy { color: navy; }
span.olive { color: olive; }
span.purple { color: purple; }
span.red { color: red; }
span.silver { color: silver; }
span.teal { color: teal; }
span.white { color: white; }
span.yellow { color: yellow; }

span.aqua-background { background: aqua; }
span.black-background { background: black; }
span.blue-background { background: blue; }
span.fuchsia-background { background: fuchsia; }
span.gray-background { background: gray; }
span.green-background { background: green; }
span.lime-background { background: lime; }
span.maroon-background { background: maroon; }
span.navy-background { background: navy; }
span.olive-background { background: olive; }
span.purple-background { background: purple; }
span.red-background { background: red; }
span.silver-background { background: silver; }
span.teal-background { background: teal; }
span.white-background { background: white; }
span.yellow-background { background: yellow; }

span.big { font-size: 2em; }
span.small { font-size: 0.6em; }

span.underline { text-decoration: underline; }
span.overline { text-decoration: overline; }
span.line-through { text-decoration: line-through; }

div.unbreakable { page-break-inside: avoid; }


/*
 * xhtml11 specific
 *
 * */

div.tableblock {
  margin-top: 1.0em;
  margin-bottom: 1.5em;
}
div.tableblock > table {
  border: 3px solid #527bbd;
}
thead, p.table.header {
  font-weight: bold;
  color: #527bbd;
}
p.table {
  margin-top: 0;
}
/* Because the table frame attribute is overriden by CSS in most browsers. */
div.tableblock > table[frame="void"] {
  border-style: none;
}
div.tableblock > table[frame="hsides"] {
  border-left-style: none;
  border-right-style: none;
}
div.tableblock > table[frame="vsides"] {
  border-top-style: none;
  border-bottom-style: none;
}


/*
 * html5 specific
 *
 * */

table.tableblock {
  margin-top: 1.0em;
  margin-bottom: 1.5em;
}
thead, p.tableblock.header {
  font-weight: bold;
  color: #527bbd;
}
p.tableblock {
  margin-top: 0;
}
table.tableblock {
  border-width: 3px;
  border-spacing: 0px;
  border-style: solid;
  border-color: #527bbd;
  border-collapse: collapse;
}
th.tableblock, td.tableblock {
  border-width: 1px;
  padding: 4px;
  border-style: solid;
  border-color: #527bbd;
}

table.tableblock.frame-topbot {
  border-left-style: hidden;
  border-right-style: hidden;
}
table.tableblock.frame-sides {
  border-top-style: hidden;
  border-bottom-style: hidden;
}
table.tableblock.frame-none {
  border-style: hidden;
}

th.tableblock.halign-left, td.tableblock.halign-left {
  text-align: left;
}
th.tableblock.halign-center, td.tableblock.halign-center {
  text-align: center;
}
th.tableblock.halign-right, td.tableblock.halign-right {
  text-align: right;
}

th.tableblock.valign-top, td.tableblock.valign-top {
  vertical-align: top;
}
th.tableblock.valign-middle, td.tableblock.valign-middle {
  vertical-align: middle;
}
th.tableblock.valign-bottom, td.tableblock.valign-bottom {
  vertical-align: bottom;
}


/*
 * manpage specific
 *
 * */

body.manpage h1 {
  padding-top: 0.5em;
  padding-bottom: 0.5em;
  border-top: 2px solid silver;
  border-bottom: 2px solid silver;
}
body.manpage h2 {
  border-style: none;
}
body.manpage div.sectionbody {
  margin-left: 3em;
}

@media print {
  body.manpage div#toc { display: none; }
}


</style>
<script type="text/javascript">
/*<![CDATA[*/
var asciidoc = {  // Namespace.

/////////////////////////////////////////////////////////////////////
// Table Of Contents generator
/////////////////////////////////////////////////////////////////////

/* Author: Mihai Bazon, September 2002
 * http://students.infoiasi.ro/~mishoo
 *
 * Table Of Content generator
 * Version: 0.4
 *
 * Feel free to use this script under the terms of the GNU General Public
 * License, as long as you do not remove or alter this notice.
 */

 /* modified by Troy D. Hanson, September 2006. License: GPL */
 /* modified by Stuart Rackham, 2006, 2009. License: GPL */

// toclevels = 1..4.
toc: function (toclevels) {

  function getText(el) {
    var text = "";
    for (var i = el.firstChild; i != null; i = i.nextSibling) {
      if (i.nodeType == 3 /* Node.TEXT_NODE */) // IE doesn't speak constants.
        text += i.data;
      else if (i.firstChild != null)
        text += getText(i);
    }
    return text;
  }

  function TocEntry(el, text, toclevel) {
    this.element = el;
    this.text = text;
    this.toclevel = toclevel;
  }

  function tocEntries(el, toclevels) {
    var result = new Array;
    var re = new RegExp('[hH]([1-'+(toclevels+1)+'])');
    // Function that scans the DOM tree for header elements (the DOM2
    // nodeIterator API would be a better technique but not supported by all
    // browsers).
    var iterate = function (el) {
      for (var i = el.firstChild; i != null; i = i.nextSibling) {
        if (i.nodeType == 1 /* Node.ELEMENT_NODE */) {
          var mo = re.exec(i.tagName);
          if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") {
            result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
          }
          iterate(i);
        }
      }
    }
    iterate(el);
    return result;
  }

  var toc = document.getElementById("toc");
  if (!toc) {
    return;
  }

  // Delete existing TOC entries in case we're reloading the TOC.
  var tocEntriesToRemove = [];
  var i;
  for (i = 0; i < toc.childNodes.length; i++) {
    var entry = toc.childNodes[i];
    if (entry.nodeName.toLowerCase() == 'div'
     && entry.getAttribute("class")
     && entry.getAttribute("class").match(/^toclevel/))
      tocEntriesToRemove.push(entry);
  }
  for (i = 0; i < tocEntriesToRemove.length; i++) {
    toc.removeChild(tocEntriesToRemove[i]);
  }

  // Rebuild TOC entries.
  var entries = tocEntries(document.getElementById("content"), toclevels);
  for (var i = 0; i < entries.length; ++i) {
    var entry = entries[i];
    if (entry.element.id == "")
      entry.element.id = "_toc_" + i;
    var a = document.createElement("a");
    a.href = "#" + entry.element.id;
    a.appendChild(document.createTextNode(entry.text));
    var div = document.createElement("div");
    div.appendChild(a);
    div.className = "toclevel" + entry.toclevel;
    toc.appendChild(div);
  }
  if (entries.length == 0)
    toc.parentNode.removeChild(toc);
},


/////////////////////////////////////////////////////////////////////
// Footnotes generator
/////////////////////////////////////////////////////////////////////

/* Based on footnote generation code from:
 * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
 */

footnotes: function () {
  // Delete existing footnote entries in case we're reloading the footnodes.
  var i;
  var noteholder = document.getElementById("footnotes");
  if (!noteholder) {
    return;
  }
  var entriesToRemove = [];
  for (i = 0; i < noteholder.childNodes.length; i++) {
    var entry = noteholder.childNodes[i];
    if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote")
      entriesToRemove.push(entry);
  }
  for (i = 0; i < entriesToRemove.length; i++) {
    noteholder.removeChild(entriesToRemove[i]);
  }

  // Rebuild footnote entries.
  var cont = document.getElementById("content");
  var spans = cont.getElementsByTagName("span");
  var refs = {};
  var n = 0;
  for (i=0; i<spans.length; i++) {
    if (spans[i].className == "footnote") {
      n++;
      var note = spans[i].getAttribute("data-note");
      if (!note) {
        // Use [\s\S] in place of . so multi-line matches work.
        // Because JavaScript has no s (dotall) regex flag.
        note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1];
        spans[i].innerHTML =
          "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n +
          "' title='View footnote' class='footnote'>" + n + "</a>]";
        spans[i].setAttribute("data-note", note);
      }
      noteholder.innerHTML +=
        "<div class='footnote' id='_footnote_" + n + "'>" +
        "<a href='#_footnoteref_" + n + "' title='Return to text'>" +
        n + "</a>. " + note + "</div>";
      var id =spans[i].getAttribute("id");
      if (id != null) refs["#"+id] = n;
    }
  }
  if (n == 0)
    noteholder.parentNode.removeChild(noteholder);
  else {
    // Process footnoterefs.
    for (i=0; i<spans.length; i++) {
      if (spans[i].className == "footnoteref") {
        var href = spans[i].getElementsByTagName("a")[0].getAttribute("href");
        href = href.match(/#.*/)[0];  // Because IE return full URL.
        n = refs[href];
        spans[i].innerHTML =
          "[<a href='#_footnote_" + n +
          "' title='View footnote' class='footnote'>" + n + "</a>]";
      }
    }
  }
},

install: function(toclevels) {
  var timerId;

  function reinstall() {
    asciidoc.footnotes();
    if (toclevels) {
      asciidoc.toc(toclevels);
    }
  }

  function reinstallAndRemoveTimer() {
    clearInterval(timerId);
    reinstall();
  }

  timerId = setInterval(reinstall, 500);
  if (document.addEventListener)
    document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false);
  else
    window.onload = reinstallAndRemoveTimer;
}

}
asciidoc.install();
/*]]>*/
</script>
</head>
<body class="article">
<div id="header">
<h1>diff API</h1>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph"><p>The diff API is for programs that compare two sets of files (e.g. two
trees, one tree and the index) and present the found difference in
various ways.  The calling program is responsible for feeding the API
pairs of files, one from the "old" set and the corresponding one from
"new" set, that are different.  The library called through this API is
called diffcore, and is responsible for two things.</p></div>
<div class="ulist"><ul>
<li>
<p>
finding total rewrites (<code>-B</code>), renames (<code>-M</code>) and copies (<code>-C</code>), and
  changes that touch a string (<code>-S</code>), as specified by the caller.
</p>
</li>
<li>
<p>
outputting the differences in various formats, as specified by the
  caller.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_calling_sequence">Calling sequence</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Prepare <code>struct diff_options</code> to record the set of diff options, and
  then call <code>diff_setup()</code> to initialize this structure.  This sets up
  the vanilla default.
</p>
</li>
<li>
<p>
Fill in the options structure to specify desired output format, rename
  detection, etc.  <code>diff_opt_parse()</code> can be used to parse options given
  from the command line in a way consistent with existing git-diff
  family of programs.
</p>
</li>
<li>
<p>
Call <code>diff_setup_done()</code>; this inspects the options set up so far for
  internal consistency and make necessary tweaking to it (e.g. if
  textual patch output was asked, recursive behaviour is turned on);
  the callback set_default in diff_options can be used to tweak this more.
</p>
</li>
<li>
<p>
As you find different pairs of files, call <code>diff_change()</code> to feed
  modified files, <code>diff_addremove()</code> to feed created or deleted files,
  or <code>diff_unmerge()</code> to feed a file whose state is <em>unmerged</em> to the
  API.  These are thin wrappers to a lower-level <code>diff_queue()</code> function
  that is flexible enough to record any of these kinds of changes.
</p>
</li>
<li>
<p>
Once you finish feeding the pairs of files, call <code>diffcore_std()</code>.
  This will tell the diffcore library to go ahead and do its work.
</p>
</li>
<li>
<p>
Calling <code>diff_flush()</code> will produce the output.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_data_structures">Data structures</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
<code>struct diff_filespec</code>
</p>
</li>
</ul></div>
<div class="paragraph"><p>This is the internal representation for a single file (blob).  It
records the blob object name (if known&#8201;&#8212;&#8201;for a work tree file it
typically is a NUL SHA-1), filemode and pathname.  This is what the
<code>diff_addremove()</code>, <code>diff_change()</code> and <code>diff_unmerge()</code> synthesize and
feed <code>diff_queue()</code> function with.</p></div>
<div class="ulist"><ul>
<li>
<p>
<code>struct diff_filepair</code>
</p>
</li>
</ul></div>
<div class="paragraph"><p>This records a pair of <code>struct diff_filespec</code>; the filespec for a file
in the "old" set (i.e. preimage) is called <code>one</code>, and the filespec for a
file in the "new" set (i.e. postimage) is called <code>two</code>.  A change that
represents file creation has NULL in <code>one</code>, and file deletion has NULL
in <code>two</code>.</p></div>
<div class="paragraph"><p>A <code>filepair</code> starts pointing at <code>one</code> and <code>two</code> that are from the same
filename, but <code>diffcore_std()</code> can break pairs and match component
filespecs with other filespecs from a different filepair to form new
filepair.  This is called <em>rename detection</em>.</p></div>
<div class="ulist"><ul>
<li>
<p>
<code>struct diff_queue</code>
</p>
</li>
</ul></div>
<div class="paragraph"><p>This is a collection of filepairs.  Notable members are:</p></div>
<div class="dlist"><dl>
<dt class="hdlist1">
<code>queue</code>
</dt>
<dd>
<p>
        An array of pointers to <code>struct diff_filepair</code>.  This
        dynamically grows as you add filepairs;
</p>
</dd>
<dt class="hdlist1">
<code>alloc</code>
</dt>
<dd>
<p>
        The allocated size of the <code>queue</code> array;
</p>
</dd>
<dt class="hdlist1">
<code>nr</code>
</dt>
<dd>
<p>
        The number of elements in the <code>queue</code> array.
</p>
<div class="ulist"><ul>
<li>
<p>
<code>struct diff_options</code>
</p>
</li>
</ul></div>
</dd>
</dl></div>
<div class="paragraph"><p>This describes the set of options the calling program wants to affect
the operation of diffcore library with.</p></div>
<div class="paragraph"><p>Notable members are:</p></div>
<div class="dlist"><dl>
<dt class="hdlist1">
<code>output_format</code>
</dt>
<dd>
<p>
        The output format used when <code>diff_flush()</code> is run.
</p>
</dd>
<dt class="hdlist1">
<code>context</code>
</dt>
<dd>
<p>
        Number of context lines to generate in patch output.
</p>
</dd>
<dt class="hdlist1">
<code>break_opt</code>, <code>detect_rename</code>, <code>rename-score</code>, <code>rename_limit</code>
</dt>
<dd>
<p>
        Affects the way detection logic for complete rewrites, renames
        and copies.
</p>
</dd>
<dt class="hdlist1">
<code>abbrev</code>
</dt>
<dd>
<p>
        Number of hexdigits to abbreviate raw format output to.
</p>
</dd>
<dt class="hdlist1">
<code>pickaxe</code>
</dt>
<dd>
<p>
        A constant string (can and typically does contain newlines to
        look for a block of text, not just a single line) to filter out
        the filepairs that do not change the number of strings contained
        in its preimage and postimage of the diff_queue.
</p>
</dd>
<dt class="hdlist1">
<code>flags</code>
</dt>
<dd>
<p>
        This is mostly a collection of boolean options that affects the
        operation, but some do not have anything to do with the diffcore
        library.
</p>
</dd>
<dt class="hdlist1">
<code>touched_flags</code>
</dt>
<dd>
<p>
        Records whether a flag has been changed due to user request
        (rather than just set/unset by default).
</p>
</dd>
<dt class="hdlist1">
<code>set_default</code>
</dt>
<dd>
<p>
        Callback which allows tweaking the options in diff_setup_done().
</p>
<div class="dlist"><dl>
<dt class="hdlist1">
BINARY, TEXT
</dt>
<dd>
<p>
        Affects the way how a file that is seemingly binary is treated.
</p>
</dd>
<dt class="hdlist1">
FULL_INDEX
</dt>
<dd>
<p>
        Tells the patch output format not to use abbreviated object
        names on the "index" lines.
</p>
</dd>
<dt class="hdlist1">
FIND_COPIES_HARDER
</dt>
<dd>
<p>
        Tells the diffcore library that the caller is feeding unchanged
        filepairs to allow copies from unmodified files be detected.
</p>
</dd>
<dt class="hdlist1">
COLOR_DIFF
</dt>
<dd>
<p>
        Output should be colored.
</p>
</dd>
<dt class="hdlist1">
COLOR_DIFF_WORDS
</dt>
<dd>
<p>
        Output is a colored word-diff.
</p>
</dd>
<dt class="hdlist1">
NO_INDEX
</dt>
<dd>
<p>
        Tells diff-files that the input is not tracked files but files
        in random locations on the filesystem.
</p>
</dd>
<dt class="hdlist1">
ALLOW_EXTERNAL
</dt>
<dd>
<p>
        Tells output routine that it is Ok to call user specified patch
        output routine.  Plumbing disables this to ensure stable output.
</p>
</dd>
<dt class="hdlist1">
QUIET
</dt>
<dd>
<p>
        Do not show any output.
</p>
</dd>
<dt class="hdlist1">
REVERSE_DIFF
</dt>
<dd>
<p>
        Tells the library that the calling program is feeding the
        filepairs reversed; <code>one</code> is two, and <code>two</code> is one.
</p>
</dd>
<dt class="hdlist1">
EXIT_WITH_STATUS
</dt>
<dd>
<p>
        For communication between the calling program and the options
        parser; tell the calling program to signal the presence of
        difference using program exit code.
</p>
</dd>
<dt class="hdlist1">
HAS_CHANGES
</dt>
<dd>
<p>
        Internal; used for optimization to see if there is any change.
</p>
</dd>
<dt class="hdlist1">
SILENT_ON_REMOVE
</dt>
<dd>
<p>
        Affects if diff-files shows removed files.
</p>
</dd>
<dt class="hdlist1">
RECURSIVE, TREE_IN_RECURSIVE
</dt>
<dd>
<p>
        Tells if tree traversal done by tree-diff should recursively
        descend into a tree object pair that are different in preimage
        and postimage set.
</p>
</dd>
</dl></div>
</dd>
</dl></div>
<div class="paragraph"><p>(JC)</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated 2013-10-23 14:56:14 PDT
</div>
</div>
</body>
</html>
